神经细胞膜上Na+的跨膜转运方式是()
A. 单纯扩散
B. 易化扩散
C. 主动转运
D. 易化扩散和主动转运
E. 单纯扩散和主动转运
Which of the following best describes a physiological difference between the contraction of smooth muscle compared with the contraction of cardiac muscle and skeletal muscle?( )
A. Ca++ independent
B. Does not require an action potential
C. Requires more energy
D. Shorter in duration
E. None of the above
在直流电路中,电感相当于______ ,电容相当于______ 。 ______
一个6条支路4个节点的电路,可列写的相互独立的KVL方程个数是______ ______ ______ 。